The term "croak" refers to a low, hoarse sound often associated with certain animals, particularly amphibians like frogs. This sound is produced by the vibration of vocal cords and is commonly used by male frogs during mating season to attract females. Each species of frog has its own unique croak, which can vary in pitch and duration. In addition to frogs, the word "croak" can also describe the sound made by some birds, such as crows or ravens. These birds produce a harsh, guttural noise that can be heard in various environments. The croaking sound serves different purposes, including communication and signaling alarm to other members of their species.